Deathrite Shaman [Guilds of Ravnica Guild Kit] Magic 2013 Prerelease Promos you may add X mana

you may add X mana of any one color

Set: Friday Night Magic 2016 Type: Instant Rarity: Rare Cost: {X}{U} Counter target spell unless its controller pays {X}

To consult a sphinx is a test in patience

history vanishes in the dust

Rats you control have deathtouch

Deathrite Shaman [Guilds of Ravnica Guild Kit] Magic 2013 Prerelease Promos you may add X manaSet: Guilds of Ravnica Guild Kit Type: Creature Elf Shaman Rarity: Rare Cost: {B G} {T}: Exile target land card from a graveyard. Add one mana of any color. {B}, {T}: Exile target instant or sorcery card from a graveyard. Each opponent loses 2 life. {G}, {T}: Exile target creature card from a graveyard. You gain 2 life.